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Mathematica : Recent Questions and Answers (Page 18)

Find answers to your questions about Mathematica or help others by answering their Mathematica questions.

Variable order in InterpolatingFunction

I'm attempting to deal with a interpolating a function $f[x,t]$ on an unevenly spaced grid of $n$ points. My x-variable is continuous, so there's no difficulty in...

Asked on 09/30/2021 by logosintegralis

0 answer

`QPochhammer` function simplification?

Consider the function $$(a;q)_n=begin{cases}1&n=0,(1-a)(1-aq)cdots(1-aq^{n-1})&n=1,2,dots,[(1-aq^{-1})(1-aq^{-2})cdots(1-aq^n)]^{-1}&n=-1,-2,dotsend{cases}$$ which in Mathematica is denoted as QPochhammer[a, q, n], and its infinite product cousin: $$(a;q)_infty=prod_{k=0}^infty (1-aq^k)$$ which in Mathematica reads QPochhammer[a,...

Asked on 09/30/2021

1 answer

Mathematica 12 HighlightImage doubles image dimensions ! Bug?

My scripts that use HighlightImage stopped working after upgrading to 12.I discovered that HighlightImage doubles the Dimensions of the image, see below. Bug ?? workaround ? I need the...

Asked on 09/30/2021

1 answer

How can I remove vanishing derivatives of hypergeometric functions?

I have a lot of expressions containing derivatives of hypergeometric functions of the sort: $$_2F_1^{(0,0,1,0)} left(frac{1}{2} , 1 ; frac{3}{2} ; 0 right). tag{1}$$ The last argument is always...

Asked on 09/29/2021

1 answer

Python module error using Externalsession

What I am trying to do is to generate an array using Python inside Mathematica but I getting TypeError required field:type_ignores missing Module.Here is the image:...

Asked on 09/29/2021

1 answer

How can I combine NIntegrate with NDSolve?

I have no idea how to calculate the problems.For example consider following differential equation (DE):NDSolve[{x''[t] + 2/t x'[t] == (x[t])^2 + (x[t])^4 + 34, ...

Asked on 09/29/2021 by Mksjd

1 answer

How to find the expectation $mathbb{E}left[ a mathcal{Q} left( sqrt{b } gamma right) right]$?

I'm trying to find the following expectation $$mathbb{E}left[ a mathcal{Q} left( sqrt{b } gamma right) right],$$where $a$ and $b$ are constant values, $mathcal{Q}$ is the...

Asked on 09/29/2021

1 answer

Create a set of prime factor numbers given a set of tuples

Given a set $Omega$ of tuples, for example,Tuples[{Range[0, 4], Range[0, 3], Range[0, 2]}]how can I create all numbers on the form $p_1^{t_1}p_2^{t_2}p_3^{t_3}$ where $p_i$ are (prime)...

Asked on 09/29/2021

0 answer

How to add a front-end to the free Wolfram Engine?

https://blog.stephenwolfram.com/2019/05/launching-today-free-wolfram-engine-for-developers/ http://www.wolfram.com/engine/ The Free Wolfram Engine for Developers is available for pre-production software development. You can use this product to:Develop a product for yourself or your...

Asked on 09/29/2021 by Alexey Golyshev

6 answer

How to evaluate a multidimensional NIntegral in a range where certain conditions must be satisfied by the variables

I have a function f which looks similar to this :f[a_, b_, c_] := NIntegrate[sigma[a, b, c], {a, -valueA, valueA}, {b, -valueB, valueB}, {c, -valueC, valueC}] and wish...

Asked on 09/29/2021

1 answer

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